The US government has fined American Airlines 50 million dollars (£38.5 million) for failing to provide wheelchair assistance to passengers with disabilities and damaging thousands of wheelchairs over a five-year period.
The US Transportation Department said “in some cases”, wheelchair users were injured, but it did not specify how many.
American said it has made significant investments to improve the handling of wheelchairs. The airline will be credited 25 million dollars (£19.25 million), or half of its civil penalty, for those investments and compensation paid to affected passengers, according to a consent order.
The incidents raised by the US Transportation Department occurred between 2019 and 2023.
The investigation was prompted in part by three formal complaints the Paralysed Veterans of America filed against American.
Transportation Secretary Pete Buttigieg said American Airlines “appeared to be one of the worst offenders”, but the problems that investigators found “are not confined to one airline”.
He said the department is conducting similar investigations into other airlines, but he would not name them.
“The era of tolerating poor treatment of wheelchair users on aeroplanes is over,” Mr Buttigieg declared to reporters.
From 2019 through 2023, American mishandled more than 10,760 wheelchairs and mobility scooters, according to Transportation Department figures. Only Southwest Airlines, at more than 11,100, had more incidents.
Spirit Airlines had the highest percentage of errors in several of the years, according to the department.
The airline said it has cut its rate of mishandling wheelchairs and power scooters by more than 20%, and fewer than one in every 1,000 customers who ask for wheelchair assistance wind up complaining to the airline.
The punishment for American is far more severe than the Transportation Department meted out to other airlines that it determined had violated laws protecting travellers with disabilities.
The previous record penalty was two million dollars (£1.54 million) against United Airlines in 2016, which was reduced to 700,000 dollars (£539,000) after United was credited for compensating passengers and other spending.
Department officials said the size of the fine against American reflected the large number of incidents, which included damaging wheelchairs or taking too long to return them to passengers after flights.
Federal regulations require airlines to return wheelchairs and scooters to customers quickly and undamaged after flights, and to help passengers with disabilities get around airports and get on and off planes.
Airlines are required to pay for repairs or replacement of damaged wheelchairs, but advocates say that can still leave users without a suitable way to get around for weeks.